package com.mygodp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.mygodp.dto.UserDTO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Slf4j
public class RefreshTokenInterceptor implements HandlerInterceptor {

    StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.获取session
        String token = request.getHeader("authorization");
        if(StrUtil.isBlank(token)){
            return true;
        }
        //2.获取token中的用户
        String key= RedisConstants.LOGIN_USER_KEY + token;
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash()
                .entries(key);
        //3.判断用户是否存在
        if(userMap.isEmpty()){
            return true;
        }

        //5.存在，保存用户信息到ThreadLocal
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap,new UserDTO(),false);
        UserHolder.saveUser(userDTO);

        //6.刷新token有效期
        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除用户 防止泄露
        UserHolder.removeUser();
    }
}
